WO2012057181A1 - Lubricating grease composition - Google Patents

Lubricating grease composition Download PDF

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Publication number
WO2012057181A1
WO2012057181A1 PCT/JP2011/074624 JP2011074624W WO2012057181A1 WO 2012057181 A1 WO2012057181 A1 WO 2012057181A1 JP 2011074624 W JP2011074624 W JP 2011074624W WO 2012057181 A1 WO2012057181 A1 WO 2012057181A1
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WO
WIPO (PCT)
Prior art keywords
base oil
grease composition
lubricating grease
machine tool
grease
Prior art date
Application number
PCT/JP2011/074624
Other languages
French (fr)
Japanese (ja)
Inventor
高行 有安
董　大明
大関　浩
実 並木
照 吉成
Original Assignee
リューベ株式会社
協同油脂株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by リューベ株式会社, 協同油脂株式会社 filed Critical リューベ株式会社
Priority to EP11836314.2A priority Critical patent/EP2634239B1/en
Priority to US13/879,167 priority patent/US9399748B2/en
Priority to KR1020137011382A priority patent/KR101540348B1/en
Priority to CN201180051490.2A priority patent/CN103189484B/en
Priority to BR112013009373A priority patent/BR112013009373A2/en
Publication of WO2012057181A1 publication Critical patent/WO2012057181A1/en
Priority to HK13114305.6A priority patent/HK1186749A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1038—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
    • B23Q11/1061—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality using cutting liquids with specially selected composition or state of aggregation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/16—Amides; Imides
    • C10M133/18—Amides; Imides of carbonic or haloformic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/38—Heterocyclic nitrogen compounds
    • C10M133/40—Six-membered ring containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/06—Mixtures of thickeners and additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/066—Molybdenum sulfide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/082—Inorganic acids or salts thereof containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/221—Six-membered rings containing nitrogen and carbon only
    • C10M2215/222—Triazines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/09—Complexes with metals
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators

Definitions

  • the present invention relates to a machine tool having an automatic grease supply device, and more particularly to a lubricating grease composition for use in a sliding surface lubrication part of the machine tool.
  • the lubricating grease composition of the present invention can be suitably used for rolling lubrication parts such as ball screws and linear guides.
  • Stick-slip occurs because there is no lubricating oil film at the start of operation and static friction increases. Since the oil film thickness theoretically becomes zero while the sliding surface is stopped, this phenomenon occurs at the start of starting. Stick-slip is unlikely to occur with lubricating oil. This is because the lubricating oil is excellent in the inflow property to the sliding surface, so that an oil film is immediately formed at the start of starting. On the other hand, since the inflow of grease to the sliding surface is inferior and an oil film cannot be formed immediately, improvement of stick-slip resistance has been a major issue.
  • the present invention provides a lubricating grease composition that can be pumped by an automatic greasing device attached to a machine tool and that suppresses the occurrence of stick-slip at the sliding surface lubrication part of the machine tool. Let it be an issue.
  • the present inventors addressed this problem by adopting a base oil having a specific kinematic viscosity, adding a solid powder insoluble in the base oil, and adjusting the consistency of the lubricating grease composition. That is, the present invention provides the following lubricating grease composition. 1. a base oil having a kinematic viscosity at 40 ° C. of 10 to 200 mm 2 / s; Containing 0.1 to 10% by weight of solid powder insoluble in base oil, The blend penetration is 400-500, Lubricating grease composition for machine tools having an automatic grease supply device. 2. 2.
  • the lubricating grease composition according to item 1 wherein the solid powder is at least one selected from the group consisting of organic molybdenum, tetrafluoroethylene resin, melamine cyanurate, molybdenum disulfide, graphite, and metal salt of dialkyldithiocarbamate. 3.
  • the present invention it is possible to lubricate with the automatic greasing device attached to the machine tool, and it is possible to suppress the occurrence of stick-slip at the sliding surface lubrication part of the machine tool.
  • the lubricating grease composition of the present invention is used, processing accuracy is also improved. Since the leakage is small, it can be suitably used for rolling parts such as ball screws and linear guides attached to machine tools.
  • the kinematic viscosity of the base oil at 40 ° C. needs to be 10 to 200 mm 2 / s.
  • This kinematic viscosity range belongs to the lower range of grease base oil, but if it exceeds 200 mm 2 / s, the apparent viscosity of the grease will increase, and it will not be possible to pump by the automatic greasing device attached to the machine tool. Occurs. If it is less than 10 mm 2 / s, an oil film effective as a lubricating oil is not formed. For the same reason, the thickness is more preferably 30 to 150 mm 2 / s.
  • any grease base oil can be used regardless of whether it is a mineral oil or a synthetic oil, independently or mixed, as long as the above kinematic viscosity range is satisfied.
  • Mineral oil is preferred.
  • both paraffinic and naphthenic oils can be used. Paraffin type is preferred.
  • Examples of synthetic oils include diester oils, ester synthetic oils typified by polyol ester oils, polyalphaolefins, synthetic hydrocarbon oils typified by polybutene, alkyl diphenyl ethers, ether synthetic oils typified by polypropylene glycol, Examples thereof include fluorine-based synthetic oils represented by perfluoroalkyl polyether oils.
  • any solid powder can be used regardless of whether it is organic or inorganic as long as it is insoluble in the base oil.
  • a solid lubricant examples include tetrafluoroethylene resin (PTFE), melamine cyanurate (MCA), molybdenum disulfide, and graphite.
  • solid load-bearing additives examples include organic molybdenum and dialkyldithiocarbamic acid metal salts.
  • inorganic solid powders include metal oxides such as zinc oxide and titanium oxide, and metal powders.
  • Organic solid powders include many solid powders such as resin solid powders and food solid powders. Can be given. Among these, at least selected from solid lubricants and solid load-bearing additives, that is, organic molybdenum, tetrafluoroethylene resin (PTFE), melamine cyanurate (MCA), molybdenum disulfide, graphite, and metal salt of dialkyldithiocarbamate.
  • solid lubricant is more preferred. More preferred are organic molybdenum, PTFE, and MCA.
  • organic molybdenum is yellow powder
  • PTFE and MCA are white powder
  • dialkyldithiocarbamate metal salt is brown powder, for example, while molybdenum disulfide and graphite are black powder, leading to contamination of the surrounding environment. This is because there is not.
  • the addition amount of the solid powder is preferably 0.1 to 10% by mass based on the total mass of the composition of the present invention. If it is less than 0.1%, the effect is small, and if it exceeds 10%, the effect reaches a peak. For the same reason, it is preferably 0.2 to 5%.
  • the solid powder insoluble in the base oil is present between the sliding surfaces even when the machine tool is stopped, and it is possible to prevent direct contact between both sliding surfaces. It is presumed that stick slip can be suppressed because grease (oil) can be present in the gap between the sliding surfaces, and the lack of oil film thickness can be improved at the start of starting the sliding surfaces.
  • Grease having a miscibility of 400-500 is a semi-liquid grease that is fairly soft among greases.
  • the lubricating grease composition of the present invention can be pumped with an automatic greasing device. If the penetration is less than 400, grease may be clogged.
  • the penetration level is greater than 500, the grease becomes soft and almost liquid, and the advantages of using grease, that is, the cost of lubricating oil consumption, environmental / atmosphere / machine contamination, and deterioration of working environment due to mist generation. As a result, the change from lubricating oil to grease is no longer meaningful. Therefore, the penetration is 400 to 500, preferably 400 to 470.
  • a thickener is optionally contained in the base oil to form a grease.
  • the thickener can be used without any limitation.
  • PTFE is used as a solid powder insoluble in the base oil, it acts as a thickener, so that it is not necessary to add a thickener.
  • thickeners include soap-type thickeners represented by Li soap and Li complex soap, urea-type thickeners represented by diurea and polyurea, inorganic thickeners represented by silica and organic clay. And organic thickeners such as PTFE. Suitable thickeners include Li soap and diurea because of their versatility.
  • additives usually used for lubricating oils and greases can be further used. Specific examples include load bearing additives, antioxidants, rust inhibitors, and metal corrosion inhibitors. Examples of load-bearing additives that dissolve in the base oil include phosphorus-based load-bearing additives such as phosphate esters, sulfur-based load-bearing additives such as polysulfides and sulfurized fats and oils, and phosphorus-sulfur-based load-resistant additives such as phosphorothioate.
  • load bearing additives such as phosphate esters
  • sulfur-based load-bearing additives such as polysulfides and sulfurized fats and oils
  • phosphorus-sulfur-based load-resistant additives such as phosphorothioate.
  • Examples thereof include a load additive, a thiocarbamate containing liquid organic molybdenum, an organic metal salt load-bearing additive such as thiophosphate such as ZnDTP, or an organic amine salt load-bearing additive. These addition amounts are usually 0.01 to 10% by mass.
  • a machine tool having the automatic greasing device of the present invention for example, a machine tool having a structure as shown in FIG. 3 of JP-A-2005-233240 can be used.
  • Base oil Paraffinic mineral oil (Kinematic viscosity at 40 ° C is as described in Table 1 and Table 2) Solid powder insoluble in base oil: Organic Molybdenum A: Adeka Sakura Lube 600 (Asahi Denka) Organic molybdenum B: Molyvan A (RTVanderbilt) PTFE: Lubron L5F (manufactured by Daikin Industries, Ltd.) MCA: Commercially available general grade copper carbamate (copper alkyldithiocarbamate): Noxeller TTCU (manufactured by Ouchi Shinsei Chemical Co., Ltd.) Molybdenum disulfide: Commercially available general grade Graphite: Commercially available general grade For comparison, organic molybdenum (liquid): Molyvan 822 (manufactured by RTVanderbilt) Thickener: Aliphatic
  • a predetermined amount is reacted at a ratio of 2 mol of octylamine to 1 mol of diphenylmethane-4,4'-diisocyanate, and a predetermined amount of solid powder insoluble in the base oil is added. It adjusted so that it might become a regular penetration with a 3 roll mill.
  • the kinematic viscosity at 40 ° C. of the base oil was measured based on JIS K2283. “% By mass” in Tables 1 and 2 is a value based on the total mass of the test grease.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lubricants (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The present invention provides a lubricating grease composition for a machine tool equipped with an automatic grease supply device, which contains a base oil having a kinematic viscosity at 40˚C of 10-200 mm2/s and 0.1-10% by mass of a solid powder that is not soluble in the base oil, and which has a worked penetration of 400-500. This lubricating grease composition can be supplied by an automatic grease supply device that is attached to a machine tool and is capable of suppressing the occurrence of stick-slip in a sliding surface lubrication part of the machine tool.

Description

潤滑グリース組成物Lubricating grease composition
　本発明は、グリース自動給脂装置を有する工作機械に、詳しくは、前記工作機器の摺動面潤滑部に使用するための潤滑グリース組成物に関する。本発明の潤滑グリース組成物は、ボールネジやリニアガイドなど、転がり潤滑部にも好適に使用できる。 The present invention relates to a machine tool having an automatic grease supply device, and more particularly to a lubricating grease composition for use in a sliding surface lubrication part of the machine tool. The lubricating grease composition of the present invention can be suitably used for rolling lubrication parts such as ball screws and linear guides.
　従来、摺動面潤滑部を有する工作機械の潤滑剤としては、潤滑油が使用され、グリースは殆んど使用されなかった。これは、グリースは半固体状であることから、油状（液状）の潤滑油より摺動面への流入が劣り、潤滑不良に至ることが多かったためと考えられる。また、グリースは半固体状であるため、自動給脂装置での圧送し難いか又は圧送出来ないという不具合点があった。
　潤滑油は圧送可能であるものの、過剰な量を垂れ流しにして使用するため、使用量が多くなり、潤滑油の消費コストが大きくなるという問題がある。加えて、潤滑油が飛散して、環境・雰囲気や機械を汚損したり、潤滑油のミストが発生して作業環境を悪化させるという問題がある。
　このため、使用量も削減でき、垂れ流しにならず、飛散も小さく、圧送可能なグリースが望まれていた。 Conventionally, as a lubricant for a machine tool having a sliding surface lubrication portion, a lubricating oil has been used, and almost no grease has been used. This is presumably because the grease is semi-solid, so that the flow into the sliding surface is inferior to that of oily (liquid) lubricating oil, which often leads to poor lubrication. Further, since the grease is in a semi-solid state, there is a problem that it is difficult to pump or cannot be pumped with an automatic greaser.
Although the lubricating oil can be pumped, there is a problem that an excessive amount of the lubricating oil is used in a dripping manner, so that the amount used is increased and the consumption cost of the lubricating oil is increased. In addition, there is a problem that the lubricating oil scatters and pollutes the environment / atmosphere and the machine, or the lubricating oil mist is generated and the working environment is deteriorated.
For this reason, there has been a demand for grease that can reduce the amount of use, does not spill, is less scattered, and can be pumped.
　工作機械の摺動面は、起動し始めに引っ掛かりを起こす。この現象は、スティックスリップと呼ばれ、加工精度に影響を与える。スティックスリップは、起動し始めには潤滑油膜がなく静摩擦が大きくなるために起こる。摺動面の停止中は理論上油膜厚さがゼロになってしまうため、起動し始めにこの現象が起こる。
　潤滑油ではスティックスリップは発生しにくい。これは、潤滑油は摺動面への流入性に優れるため、起動し始めに直ちに油膜が形成されるためである。
　一方、グリースは摺動面への流入が劣るため、直ちに油膜を構成できないことから、耐スティックスリップ性の改善は大きな課題であった。 The sliding surface of the machine tool is caught at the start of activation. This phenomenon is called stick-slip and affects the processing accuracy. Stick-slip occurs because there is no lubricating oil film at the start of operation and static friction increases. Since the oil film thickness theoretically becomes zero while the sliding surface is stopped, this phenomenon occurs at the start of starting.
Stick-slip is unlikely to occur with lubricating oil. This is because the lubricating oil is excellent in the inflow property to the sliding surface, so that an oil film is immediately formed at the start of starting.
On the other hand, since the inflow of grease to the sliding surface is inferior and an oil film cannot be formed immediately, improvement of stick-slip resistance has been a major issue.
　従って、本発明は、工作機械に付属している自動給脂装置で圧送可能であり、かつ工作機械の摺動面潤滑部でのスティックスリップの発生を抑制した潤滑グリース組成物を提供することを課題とする。 Therefore, the present invention provides a lubricating grease composition that can be pumped by an automatic greasing device attached to a machine tool and that suppresses the occurrence of stick-slip at the sliding surface lubrication part of the machine tool. Let it be an issue.
　本発明者らは、この課題に対し、特定の動粘度を有する基油を採用し、基油に不溶の固体粉末を添加し、潤滑グリース組成物のちょう度を調整することにより対応した。すなわち、本発明は、以下の潤滑グリース組成物を提供する。
１．４０℃の動粘度が１０～２００mm2/sである基油と、
　基油に不溶の固体粉末を０．１～１０質量％含有し、
　混和ちょう度が４００～５００である、
　グリース自動給脂装置を有する工作機械用潤滑グリース組成物。
２．前記固体粉末が、有機モリブデン、四フッ化エチレン樹脂、シアヌル酸メラミン、二硫化モリブデン、グラファイト及びジアルキルジチオカルバミン酸金属塩からなる群から選ばれる少なくとも１種である前記１項の潤滑グリース組成物。
３．基油の４０℃の動粘度が３０～１５０mm2/sである前記１又は２項記載の潤滑グリース組成物。
４．前記工作機械が摺動面潤滑部を有する前記１～３のいずれか１項記載の潤滑グリース組成物。 The present inventors addressed this problem by adopting a base oil having a specific kinematic viscosity, adding a solid powder insoluble in the base oil, and adjusting the consistency of the lubricating grease composition. That is, the present invention provides the following lubricating grease composition.
1. a base oil having a kinematic viscosity at 40 ° C. of 10 to 200 mm 2 / s;
Containing 0.1 to 10% by weight of solid powder insoluble in base oil,
The blend penetration is 400-500,
Lubricating grease composition for machine tools having an automatic grease supply device.
2. 2. The lubricating grease composition according to item 1, wherein the solid powder is at least one selected from the group consisting of organic molybdenum, tetrafluoroethylene resin, melamine cyanurate, molybdenum disulfide, graphite, and metal salt of dialkyldithiocarbamate.
3. 3. The lubricating grease composition according to 1 or 2 above, wherein the base oil has a kinematic viscosity at 40 ° C. of 30 to 150 mm 2 / s.
4). 4. The lubricating grease composition according to claim 1, wherein the machine tool has a sliding surface lubricating portion.
　本発明によれば、工作機械に付属している自動給脂装置で給脂可能であり、かつ工作機械の摺動面潤滑部でのスティックスリップの発生を抑制することができる。本発明の潤滑グリース組成物を使用すると、加工精度も向上する。漏れが小さいため、工作機械に付属のボールネジやリニアガイドといった転がり部品にも好適に使用できる。 According to the present invention, it is possible to lubricate with the automatic greasing device attached to the machine tool, and it is possible to suppress the occurrence of stick-slip at the sliding surface lubrication part of the machine tool. When the lubricating grease composition of the present invention is used, processing accuracy is also improved. Since the leakage is small, it can be suitably used for rolling parts such as ball screws and linear guides attached to machine tools.
＜４０℃の動粘度が１０～２００mm2/sの基油＞
　基油の４０℃の動粘度は１０～２００mm2/sであることが必要である。この動粘度範囲はグリースの基油としては低い方に属するが、２００mm2/sを超えると、グリースの見かけ粘度が高くなってしまい、工作機械に付属の自動給脂装置で圧送できなくなるという不具合が生じる。１０mm2/s未満では潤滑油として有効な油膜が形成されなくなる。同様の理由から、より好ましくは３０～１５０mm2/sである。
　基油としては、上記動粘度範囲を満たせば、鉱油、合成油の種類を問わず、単独・混合の別を問わずあらゆるグリース基油が使用可能である。鉱油が好ましい。
　鉱油としては、パラフィン系、ナフテン系いずれも使用できる。パラフィン系が好ましい。
　合成油の例としては、ジエステル油、ポリオールエステル油に代表されるエステル系合成油、ポリαオレフィン、ポリブテンに代表される合成炭化水素油、アルキルジフェニルエーテル、ポリプロピレングリコールに代表されるエーテル系合成油、パーフロロアルキルポリエーテル油に代表されるフッ素系合成油などが挙げられる。 <Base oil with a kinematic viscosity at 40 ° C of 10 to 200 mm 2 / s>
The kinematic viscosity of the base oil at 40 ° C. needs to be 10 to 200 mm 2 / s. This kinematic viscosity range belongs to the lower range of grease base oil, but if it exceeds 200 mm 2 / s, the apparent viscosity of the grease will increase, and it will not be possible to pump by the automatic greasing device attached to the machine tool. Occurs. If it is less than 10 mm 2 / s, an oil film effective as a lubricating oil is not formed. For the same reason, the thickness is more preferably 30 to 150 mm 2 / s.
As the base oil, any grease base oil can be used regardless of whether it is a mineral oil or a synthetic oil, independently or mixed, as long as the above kinematic viscosity range is satisfied. Mineral oil is preferred.
As the mineral oil, both paraffinic and naphthenic oils can be used. Paraffin type is preferred.
Examples of synthetic oils include diester oils, ester synthetic oils typified by polyol ester oils, polyalphaolefins, synthetic hydrocarbon oils typified by polybutene, alkyl diphenyl ethers, ether synthetic oils typified by polypropylene glycol, Examples thereof include fluorine-based synthetic oils represented by perfluoroalkyl polyether oils.
＜基油に不溶の固体粉末＞
　基油に不溶の固体粉末としては、基油に不溶であれば、有機系・無機系を問わずあらゆる固体粉末が使用可能である。
　前記固体粉末としては、固体潤滑剤や固体状の耐荷重添加剤、無機系又は有機系固体粉末を使用することができる。
　固体潤滑剤としては、四フッ化エチレン樹脂（ＰＴＦＥ）、シアヌル酸メラミン（ＭＣＡ）、二硫化モリブデン、グラファイトがあげられる。固体状の耐荷重添加剤としては有機モリブデンやジアルキルジチオカルバミン酸金属塩があげられる。また、無機系の固体粉末としては、酸化亜鉛や酸化チタンなどの金属酸化物や金属粉末などがあげられ、有機系の固体粉末としては、樹脂の固体粉末や食品の固体粉末など多くの固体粉末があげられる。この中では固体潤滑剤や固体状の耐荷重添加剤、すなわち有機モリブデン、四フッ化エチレン樹脂（ＰＴＦＥ）、シアヌル酸メラミン（ＭＣＡ）、二硫化モリブデン、グラファイト、ジアルキルジチオカルバミン酸金属塩から選ばれる少なくとも１種の固体潤滑剤がさらに好ましい。さらに好ましくは、有機モリブデン、ＰＴＦＥ、ＭＣＡである。これは、有機モリブデンが黄色粉末、ＰＴＦＥ、ＭＣＡが白色粉末、ジアルキルジチオカルバミン酸金属塩が例えば茶色粉末であるのに対し、二硫化モリブデン、グラファイトは黒色粉末であり、周辺環境の汚損につながり、好ましくないためである。 <Solid powder insoluble in base oil>
As the solid powder insoluble in the base oil, any solid powder can be used regardless of whether it is organic or inorganic as long as it is insoluble in the base oil.
As the solid powder, a solid lubricant, a solid load-bearing additive, an inorganic or organic solid powder can be used.
Examples of the solid lubricant include tetrafluoroethylene resin (PTFE), melamine cyanurate (MCA), molybdenum disulfide, and graphite. Examples of solid load-bearing additives include organic molybdenum and dialkyldithiocarbamic acid metal salts. Examples of inorganic solid powders include metal oxides such as zinc oxide and titanium oxide, and metal powders. Organic solid powders include many solid powders such as resin solid powders and food solid powders. Can be given. Among these, at least selected from solid lubricants and solid load-bearing additives, that is, organic molybdenum, tetrafluoroethylene resin (PTFE), melamine cyanurate (MCA), molybdenum disulfide, graphite, and metal salt of dialkyldithiocarbamate. One solid lubricant is more preferred. More preferred are organic molybdenum, PTFE, and MCA. This is because organic molybdenum is yellow powder, PTFE and MCA are white powder, and dialkyldithiocarbamate metal salt is brown powder, for example, while molybdenum disulfide and graphite are black powder, leading to contamination of the surrounding environment. This is because there is not.
　前記固体粉末の添加量としては、本発明の組成物の全質量を基準として、０．１～１０質量％が望ましい。０．１％未満では効果は小さく、１０％を超えると効果は頭打ちになる。同様の理由で、好ましくは０．２～５％である。
　如何なる理論にも拘束されるものではないが、基油に不溶の固体粉末は、工作機械の停止中でも摺動面間に存在して、摺動両面の直接接触を防ぐことが可能であり、この摺動面間の隙間にグリース（油分）が存在でき、摺動面の起動開始時に油膜厚さ不足を改善することが可能であるため、スティックスリップを抑制できると推定される。 The addition amount of the solid powder is preferably 0.1 to 10% by mass based on the total mass of the composition of the present invention. If it is less than 0.1%, the effect is small, and if it exceeds 10%, the effect reaches a peak. For the same reason, it is preferably 0.2 to 5%.
Although not bound by any theory, the solid powder insoluble in the base oil is present between the sliding surfaces even when the machine tool is stopped, and it is possible to prevent direct contact between both sliding surfaces. It is presumed that stick slip can be suppressed because grease (oil) can be present in the gap between the sliding surfaces, and the lack of oil film thickness can be improved at the start of starting the sliding surfaces.
＜混和ちょう度400～500＞
　混和ちょう度が400～500のグリースは、グリースの中ではかなり軟らかい、半液状のグリースである。混和ちょう度がこの範囲だと、本発明の潤滑グリース組成物を自動給脂装置で圧送できる。
　混和ちょう度が400未満ではグリース詰まりの恐れがある。混和ちょう度が５００より大きくなると、グリースが、軟らかく、殆んど液状となり、グリースを使用する利点、すなわち潤滑油の消費コスト削減や、環境・雰囲気や機械の汚損、ミスト発生による作業環境の悪化に対して改善ができなくなり、潤滑油からグリースへの変更の意味がなくなる。
したがって、混和ちょう度は400～500であり、好ましくは400～470である。 <Blend penetration 400-500>
Grease having a miscibility of 400-500 is a semi-liquid grease that is fairly soft among greases. When the penetration is within this range, the lubricating grease composition of the present invention can be pumped with an automatic greasing device.
If the penetration is less than 400, grease may be clogged. When the penetration level is greater than 500, the grease becomes soft and almost liquid, and the advantages of using grease, that is, the cost of lubricating oil consumption, environmental / atmosphere / machine contamination, and deterioration of working environment due to mist generation. As a result, the change from lubricating oil to grease is no longer meaningful.
Therefore, the penetration is 400 to 500, preferably 400 to 470.
＜増ちょう剤＞
　本発明の潤滑グリース組成物は、場合により増ちょう剤を基油に含ませてグリースとする。増ちょう剤としては、何ら制限無く使用可能であるが、基油に不溶の固体粉末としてＰＴＦＥを使用した場合、これが増ちょう剤としても作用するので、更に増ちょう剤を添加する必要はない。
　増ちょう剤の例としては、Li石けんやLiコンプレックス石けんに代表される石けん系増ちょう剤、ジウレア、ポリウレアに代表されるウレア系増ちょう剤、シリカ、有機化クレイに代表される無機系増ちょう剤、ＰＴＦＥに代表される有機系増ちょう剤などがある。
好適な増ちょう剤としては、その汎用性からLi石けん、ジウレアが挙げられる。 <Thickener>
In the lubricating grease composition of the present invention, a thickener is optionally contained in the base oil to form a grease. The thickener can be used without any limitation. However, when PTFE is used as a solid powder insoluble in the base oil, it acts as a thickener, so that it is not necessary to add a thickener.
Examples of thickeners include soap-type thickeners represented by Li soap and Li complex soap, urea-type thickeners represented by diurea and polyurea, inorganic thickeners represented by silica and organic clay. And organic thickeners such as PTFE.
Suitable thickeners include Li soap and diurea because of their versatility.
＜その他の添加剤＞
　必要に応じ、潤滑油やグリースに通常用いられる添加剤を更に使用することができる。
具体的には、耐荷重添加剤、酸化防止剤、錆止め剤、金属腐食防止剤などがあげられる。
　基油に溶解する耐荷重添加剤の例としては、リン酸エステルなどのリン系耐荷重添加剤、ポリサルファイド、硫化油脂などの硫黄系耐荷重添加剤、フォスフォロチオネートなどのリン-硫黄系耐荷重添加剤、液体の有機モリブデンを含むチオカルバミン酸塩、ＺｎＤＴＰなどのチオリン酸塩などの有機金属塩系耐荷重添加剤または有機アミン塩系耐荷重添加剤などが挙げられる。これらの添加量は通常0.01～10質量％である。 <Other additives>
If necessary, additives usually used for lubricating oils and greases can be further used.
Specific examples include load bearing additives, antioxidants, rust inhibitors, and metal corrosion inhibitors.
Examples of load-bearing additives that dissolve in the base oil include phosphorus-based load-bearing additives such as phosphate esters, sulfur-based load-bearing additives such as polysulfides and sulfurized fats and oils, and phosphorus-sulfur-based load-resistant additives such as phosphorothioate. Examples thereof include a load additive, a thiocarbamate containing liquid organic molybdenum, an organic metal salt load-bearing additive such as thiophosphate such as ZnDTP, or an organic amine salt load-bearing additive. These addition amounts are usually 0.01 to 10% by mass.
＜自動給脂装置を有する工作機械＞
　本発明の自動給脂装置を有する工作機械としては、例えば特開2005-233240号公報の図３に記載されているような構造のものを使用することができる。 <Machine tool with automatic greasing device>
As a machine tool having the automatic greasing device of the present invention, for example, a machine tool having a structure as shown in FIG. 3 of JP-A-2005-233240 can be used.
＜試験潤滑グリース＞
　実施例及び比較例の潤滑グリース組成物を調製するのに用いた成分を以下に示す。
　基油：パラフィン系鉱物油（40℃の動粘度は表１及び表２に記載したとおり）
　基油に不溶の固体粉末：
　　有機モリブデンA：アデカサクラルーブ６００（旭電化社製）
　　有機モリブデンB：Molyvan A (R.T.Vanderbilt社製)　
　　ＰＴＦＥ：ルブロンＬ５Ｆ（ダイキン工業（株）製）
　　ＭＣＡ：市販の一般グレード
　　銅カーバメート（アルキルジチオカルバミン酸銅）：ノクセラーTTCU（大内新興化学工業社製）
　　二硫化モリブデン：市販の一般グレード
　　グラファイト：市販の一般グレード
　　比較用として、有機モリブデン（液体）：Molyvan８２２（R.T.Vanderbilt社製）
　増ちょう剤：脂肪族ジウレア（ジフェニルメタン-4,4'-ジイソシアネートとオクチルアミンとから構成される化合物） <Test lubrication grease>
The components used to prepare the lubricating grease compositions of Examples and Comparative Examples are shown below.
Base oil: Paraffinic mineral oil (Kinematic viscosity at 40 ° C is as described in Table 1 and Table 2)
Solid powder insoluble in base oil:
Organic Molybdenum A: Adeka Sakura Lube 600 (Asahi Denka)
Organic molybdenum B: Molyvan A (RTVanderbilt)
PTFE: Lubron L5F (manufactured by Daikin Industries, Ltd.)
MCA: Commercially available general grade copper carbamate (copper alkyldithiocarbamate): Noxeller TTCU (manufactured by Ouchi Shinsei Chemical Co., Ltd.)
Molybdenum disulfide: Commercially available general grade Graphite: Commercially available general grade For comparison, organic molybdenum (liquid): Molyvan 822 (manufactured by RTVanderbilt)
Thickener: Aliphatic diurea (compound composed of diphenylmethane-4,4'-diisocyanate and octylamine)
　表１及び表２に示した基油中で、ジフェニルメタン-4,4'-ジイソシアネート１モルに対しオクチルアミン２モルの比率で所定量を反応させ、基油に不溶の固体粉末を所定量加え、３本ロールミルで規定のちょう度になるように調整した。なお、基油の４０℃における動粘度は、JIS K 2283に基づき測定した。表１及び表２中の「質量％」は、試験グリースの全質量を基準とした値である。 In the base oils shown in Table 1 and Table 2, a predetermined amount is reacted at a ratio of 2 mol of octylamine to 1 mol of diphenylmethane-4,4'-diisocyanate, and a predetermined amount of solid powder insoluble in the base oil is added. It adjusted so that it might become a regular penetration with a 3 roll mill. The kinematic viscosity at 40 ° C. of the base oil was measured based on JIS K2283. “% By mass” in Tables 1 and 2 is a value based on the total mass of the test grease.
＜試験方法＞
・外観：目視による。
・圧送性：レオメータによる下記条件での見かけ粘度の測定により判定した。
　　（試験条件）温度：２５℃
　　　　　　　　せん断率：１００ｓ-1
　　（判定基準）１．５Ｐａ・ｓ以下：合格（○）
　　　　　　　　１．５Ｐａ・ｓ超　：不合格（×） <Test method>
Appearance: Visually.
-Pumpability: Judgment was made by measuring the apparent viscosity with a rheometer under the following conditions.
(Test conditions) Temperature: 25 ° C
Shear rate: 100 s -1
(Criteria) 1.5 Pa · s or less: Pass (○)
Over 1.5 Pa · s: Fail (×)
・飛散性：下記条件によるたれ落ち試験で判定した。
　　（試験方法）SPCC-SD鋼板に試料グリース約0.4ｇを塗布し、４５度に傾け、５秒経過後のたれ落ち（移動）の有無で判定する。
　　（試験条件）温度：２５℃
　　（判定基準）たれ落ちなし：合格（○）
　　　　　　　　たれ落ちあり：不合格（×） -Scatterability: Judged by a drop test under the following conditions.
(Test method) Apply approximately 0.4 g of sample grease to the SPCC-SD steel sheet, incline it at 45 degrees, and judge whether there is any dripping (movement) after 5 seconds.
(Test conditions) Temperature: 25 ° C
(Criteria) No falling off: Pass (○)
Falling off: Fail (×)
・スティックスリップ：下記条件による摩擦試験を行い、３往復目のスティックスリップの有無で判定する。
　　（試験機）バウデン付着滑り試験機
　　（試験条件）プレート（15×160mm SPCC-SD鋼板）と鋼性円筒（φ12mm）の面接触
　　　　　　　　荷重：４kgf（接触圧力：３４３kPa）
　　　　　　　　摺動速度：30 mm/m
　　　　　　　　摺動距離：20 mm
　　　　　　　　試料グリース：約0.5ｇ
　　　　　　　　温度：２５℃
　　（判定基準）スティックスリップなし：合格（○）
　　　　　　　　スティックスリップあり：不合格（×）
　結果を表１及び表２に示す。 -Stick-slip: A friction test is performed under the following conditions, and a determination is made based on the presence or absence of a stick-slip in the third round-trip.
(Test machine) Bowden adhesion slip test machine (Test conditions) Surface contact between plate (15 x 160mm SPCC-SD steel plate) and steel cylinder (φ12mm) Load: 4kgf (contact pressure: 343kPa)
Sliding speed: 30 mm / m
Sliding distance: 20 mm
Sample grease: about 0.5g
Temperature: 25 ° C
(Criteria) No stick slip: Pass (○)
With stick-slip: Fail (×)
The results are shown in Tables 1 and 2.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002

Claims (4)

  1. 　４０℃の動粘度が１０～２００mm2/sである基油と、
    　基油に不溶の固体粉末を０．１～１０質量％含有し、
    　混和ちょう度が４００～５００である、
    　グリース自動給脂装置を有する工作機械用潤滑グリース組成物。     A base oil having a kinematic viscosity at 40 ° C. of 10 to 200 mm 2 / s;
    Containing 0.1 to 10% by weight of solid powder insoluble in base oil,
    The blend penetration is 400-500,
    Lubricating grease composition for machine tools having an automatic grease supply device.
  2. 　前記固体粉末が、有機モリブデン、四フッ化エチレン樹脂、シアヌル酸メラミン、二硫化モリブデン、グラファイト及びジアルキルジチオカルバミン酸金属塩からなる群から選ばれる少なくとも１種である請求項１の潤滑グリース組成物。 The lubricating grease composition according to claim 1, wherein the solid powder is at least one selected from the group consisting of organic molybdenum, tetrafluoroethylene resin, melamine cyanurate, molybdenum disulfide, graphite, and metal salt of dialkyldithiocarbamate.
  3. 　基油の４０℃の動粘度が３０～１５０mm2/sである請求項１又は２記載の潤滑グリース組成物。 The lubricating grease composition according to claim 1 or 2, wherein the base oil has a kinematic viscosity at 40 ° C of 30 to 150 mm 2 / s.
  4. 　前記工作機械が摺動面潤滑部を有する請求項１～３のいずれか１項記載の潤滑グリース組成物。 The lubricating grease composition according to any one of claims 1 to 3, wherein the machine tool has a sliding surface lubrication part.
PCT/JP2011/074624 2010-10-27 2011-10-26 Lubricating grease composition WO2012057181A1 (en)

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